Machine for grinding glass articles.



Patented lan. 8, |901.

No. sssJe.

F. HUBBUC'H. MACHINE F08 GRINDING GLASS ARTICLES.

'(Lpplieation mod Dec. 24, 189B.)

2 Sheets-Sheet I.

(no mul.)

Patented lan. 8, |90I.

F. A. HUBB'UCH. MACHINE FUR GRINDING GLASS ARTICLES.

(Application ma um. 24,1898.)

- 2 Sheets-Sheet 2.

(Ilo lndelf).

m u n ms Nonms rams co. PNowLrrno.. wnsnwmcn. mc.

UNrTn STATES FRANZ ANTON HUBBUOH, OF STRASBURG, GERMANY.

MACHINE FOR GRINDING GLASS ARTICLES.

SPECIFICATION forming part Of Letters Patent NO. 665,786, dated January 8, 1901.

Application iiled December 24,1898. Serial No. 700.239. (No model.)

T0 all whom, t may concern:

Be it known that LFRANZ ANTON HUBBUCH, a resident of Strasbnrg,Alsace,Germany,have invented certain new and useful Improvements in Machines for Grinding Glass Arti.- cles, of which the following is a specification.

This invention relates to the automatic machine for grinding hollow glass objects described and shown in my application for Letters Patent filed Decemberl, 1897, Serial No. 664,928; andthe objects of my present invention are to improve the prior machine, to extend its usefulness, and to effect scale-like and helical or undulatory grinding.

To accomplish these objects, my invention consists in the features of construction and in the combination or arrangement of parts hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is a vertical sectional side View of a portion of my improved machine. Fig. 2 is a top plan view. Fig. 3 is atransverse section on the line O D, Fig. 1. Fig. 4 is a detail sectional View on the line E F, Fig. 3. Fig. 5 is a detail side view of the hook and pin for holding the sliding head retracted. Fig. 6 is a broken vertical sectional View showing a modified form of machine. Fig. 7 is a detail broken side view of a part of the modified sliding head. Fig. S is a top plan View of the parts shown in Fig. 6. Fig. 9 is a sectional view taken on the line E F, Fig. 6, showing the rack-bar lowered. Fig. 10 is a similar View showing the rack-bar raised. Figs. ll and 12 are detail views of parts of the spindleturning means, hereinafter explained; and Fig. 13 is a sectional View on the line G H, Fig. 1.

In order to enable those skilled in the art to make and use my invention, I Will now describe the same in det-ail, referring first to Sheet 1 of the drawings, wherein the figures show a machi 111e for executing scale-like grinding, where four crowns or ranges of twentyfour cuts or grindin gs each are to be produced upon the glass. The cutting or grinding is started at the crown or range which lies nearest the base of the glass.

The device for mounting the glass upon the machine is the same as that employed in the original machine, and it is only the method of engaging the blank for obtaining the longitudinal movement and rotary movement of the glass which has been modified.

The hollow glass article or object to be ground is .held by suit-able chuck devices M, J, and D, the latter being driven by a chuckspindle u, which is intermittingly rotated in the sliding head B B B2, the latter being moved longitudinally on the support W under the grinding-disk or emery-wheel S. The head B' B B2, according to this improved arrangement, is not placed in connection with the spindle; but, on the contrary, a weightsuspended from the string or rope V, Fig. 1, tends to move the said head in the direction of the arrowthat is to say, toward the machineframe. This movement is regulated by a stepped ring 1, bearing against the stop X. To the stepped ring a ratchet-wheel 2 is' rigidly connected, which is adapted to turn with said ring upon the piece W and in the present case is provided with ninety-six teeth. If now, in View of the engaging method referred to, lthe stepped ring is turned in the direction in which the hand of a clock travels, (see Fig. 3,) the stop X drops from the step I upon the step II, and the glass is by the action of the Weight displaced longitudinally to the extent of the height of the step, so that the emery-wheel engages with another part of the surface of the glass.

The operation of rotating the object to be ground is more difficult during the period of working and especially ifv a crown or range has been ground and the subsequent crown or range has to be placed exactly central to the preceding crown or range. In order to illustrate this arrangement and operation, Fig. 3 represents the position of the engaging mechanism at the commencement of the operation. With the eccentric-shaft Q, Fig. 2, an engaging shaft 3 is so connected that the same, under theaction of the eccentric 23 and of the coupling-lever 24:, is compelled to eXecute an oscillating movement. This movement is by the aid of the cam transmitted to the lever 5 and causes the same to turn through an angle nl at each revolution of the shaft Q. This rotation is on its part transmitted to the shaft 6, which is provided with a lever 7. The latter is connected by means of the connecting-rod 8 to the sliding piece 9,

to which the pawl lO is pivotally secured. The counterweight 11 has the effect of keeping the pawl in constant engagement with the ratchet-wheel T. The engaging gear is so adjusted that as the stone is lifted the shaft 6 so rotates under the action of an eccentric mounted on the shaft Q that the sliding piece 9 is lifted and that the ratchet-wheel T is moved to the extent of two teeth. For rea- Io sons which will be referred to later on the ratchet-wheel has double as many teeth as scales are required to be produced on one crown upon the periphery of the glass. In order that with this engaging mechanism also the stepped ring I may be placed in connection, the shaft 6 is further provided with a short lever 12, on which a pawl 13 is arranged, which is adapted to engage with the ratchetwheel 2. Now during the period in which the zo pawl 10 causes the ratchet-wheel T to move to the extent of two teeth the pawl 13 moves the ratchet-wheel 2 to the extent of one tooth. Consequently when the forty-eight teeth of the ratchet-wheel 'l have been moved-in other words, when the said wheel has completed one revolution-then also twenty-four teeth of the ratchet-wheel 2 have been moved, or, in other words, the latter has turned through an angle of ninety degrees, and if 3o then a further engaging operation commences the stop X drops oif the step I, so that as the ratchet-wheel 2 further rotates the said stop then slides upon the step II. After this operation a new crown or range of scales can be started. As this crown must be disf `-pi'aed'to the extent of one-half division relatively to the preceding crown or range, I provide in the neighborhood of the shaft Q a further ratchet-wheel 14, having half as many 4o teeth as the ratchet-wheel T, and with the teeth of which a pawl 15, fixed to the shaft 3, is adapted to gear, whereby the motion of the ratchet-gear is stopped. At each revolution of Q this ratchet-wheel 14, always at the moment when the eccentric 23 rotates, the glass is moved forward to the extent of one tooth-that is to say, to the extent of one twenty-fourth of its periphery-so that the pawl 15 in descending always engages be- 5o tween two teeth. The twenty-fonrth-that is to say, the last-space between the teeth is slightly lower than the others, (see Fig. 11,) and after the twenty-fourth surface has been adjusted the pawl15 descends deeper into the ratchet-wheel let. Thus the whole engaging mechanism is placed lower and the pawl 10 has slid down along three teeth. If then after one revolution the glass is shifted in the manner above described to the extent ofthe 6o Aheight of one step, the lever 24:, and consequently also the pawl 15 and the whole stopwork, must now turn through the angle and a, and this movement is sufficient for causing the ratchet-wheel T to be rotated to the extent of three teeth by the aid of the pawl 10. These three teeth correspond to the whole and one-half division of the crown of scales, and

the second crown lies exactly in the middle between the rst. The pawl 10 in the further operation always shifts two teeth, and the whole second crown is evenly displaced relatively to the iirst. When the second crown has likewise been ground ready, the ratchet-wheel 1-1 has again com pleted one revolution, and on the stop X falling upon the stop III the pawl is again engaged with the lower tooth-clearing and the ratchet-wheel T is again shifted to the extent of three teeth, so that now also the third crown is displaced relatively to the second to the extent of onehalf scale.

When all four crowns or ranges are ready and the machine has been thrown out of grasp, then by means of the handle 19 the head B B B2 is pulled forward and moved into its position of'rest by causing the hook 2O connected therewith to fall into the catch 21, arranged on the adjusting-ring N.

In conformity with the explanations the construction may also be such that five or more ranges of scales may be arranged ,upon the glass by simply providing a different number of steps upon the ring.

Sheet II shows a machine for producing an entirely new kind of grinding-the so-called helix grinding. By this apparatus helical grooves are intended to beground in the glass, Vas shown in Fig. 8. The engaging operation differs f rom that hereinbefore described, inasmuch as during the period in which the emery-wheel attacks the glass the latter simultaneously executes a longitudinal and a rotary movement. The longitudinal movement is obtained in the same manner as in the case of the original machine, whereas the simultaneous rotary movement is produced by a slotted piece or race la, which is screwed to the ring N, and thus to the front portion of the support W. The oblique slot in this race has a small roller 2% which is so screwed to the rack-bar 32L as to be rotatable thereon, while the latter gears with a wheel 4L, having part of its periphery provided with teeth and being adapted to freely rotate about the guide tt when the rack-bar is being moved downward. Fig. 10 represents the rack-barin its lowest position, which it occupies at the commencement of agrinding operation. Fig. 9 represents the rack-bar in its highest position,which it occupies when a helical facet has been ground. As the rack-bar 3 passes from the one position to the other,which takes place as the head B B B2 is moved in the direction of the arrow, the engaging cone 5a, fixed to the Wheel 42, carries the ratchet-wheel 6a along with it in the direction in which the hands of a clock travel, Fig. 9, and the glass is through an angle a, seeing that the ratchetwheel A6a is connected to the spindle 'u by a wedge 7a. This rotary movement coincides with the longitudinal movement and the glass is passed along underneath the emery-wheel while moving in a helical line of high pitch` In order to admit of a second facet of this IOO IIO

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kind being ground, the ein ery- Wheel, as in the Oase of the original machine, is at the end of the stroke lifted off the glass and starts running idle. Upon the same the small roller 2 must again participate in the compulsory movement within the slot of the race, and the glass would be again moved back to the exact extent as that through which it had been moved forward during the grinding period in the direction in which ahand moves upon the dial ofa clock-namely, through the angle a. As, however, the glass. has to receive a new facet, this return movement must be smaller to the extent of one facet division than the rotation executed during the grinding movement. The ratchet-wheel 6a has just as many teeth as the glass is required to receive helical facet-s. If, therefore, the angle a comprises three teeth, then during the time the emery-wheel runs idle the rotation of the glass may amount to two tooth divisions equal tothe angle This reduced rotary motion is obtained in the following manner: The engaging cone 5, Figs. 7, 8, 9, 10, 11, and l2, has a bolt Sa acted upon by a spiral spring, which bolt is forced inward in the direction of its axis by means of the nose 9a, Iixed to the head-frame B B B2, when, during the period in which the glass is acted upon, the ratchet-wheel rotates. The nose 9a is now so beveled and adjusted that the said bolt 8, during the return movement of the cone 5, is forced out in a radial direction. The cone 5a rotates and is passed ont of engagement with the ratchet-Wheel 6a, so that now the glass no longer participates in the rotary motion until the Wheel ba has turned through the angle a and Finally the nose 9a permits of the bolt 8f dropping in under the intluence of t-he cou'nterweight lOn and the pawl again engages with a clearing, so that a fresh engaging operation through the angle a can be effected. The nose 9CL is exactly adj usted, and, together With a small plate provided with slotted holes, it forms one piece, which is screwed to the frame.

Vhat I claim is- 1. In a machine for grinding hollow glass objects, the combination of a support, asliding head on said support, a stepped ring carried by the sliding head, a fixed stop coperating with said ring for controlling the sliding movement of the head, a chuck-spindle mounted on the sliding head, and means for intermittingly turning the spindle, substantially as described.

2. In a machine for grinding hollow glass objects, the combination of a support, a longitudinally-movable head mounted on said support, means for im parting a step-by-step longitudinal movement to the head in one direction, a chuck-spindle mounted in the sliding head, and means for intermittingly turning the spindle.

3. In a machine for grinding hollow glass objects, the combination of a support, a longitudinally-movable head mounted on said 4. In a machine for grinding hollow glass I objects, the combination of a support, a longitudinally-movable head mounted on said support, a stepped ring rotatably mounted on the head, a fixed stop cooperating with the stepped ring for controlling the sliding movement of the head, a chuck-spindle carried by the head, means for turning said spindle intermittingly, and a cam and intermediate mechanism for operating the spindle-turning means.

5. In a machine for grinding hollow glass objects, the combination of a support, a 1ongitudinally-movable head mounted on said support., a stepped ring rotatably mounted on the head, a fixed stop coperating with said stepped ring for controlling the sliding movement of the head, a ratchet-Wheel on the stepped ring, a chuck-spindle carried by the head,means for rotating the chuck-spindleintermittingly,and devices operated by the spindle-turning means for engaging the ratchet- Wheel on the stepped ring to rotate the latter at intervals, substantially as described.

6. In a machine for grinding glass objects, the combination of a support, a longitudinally-movable head mounted on said support, a stepped ring rotatably mounted on the head, a fixed stop cooperating with said ring for controlling the sliding movement of the head, a ratchet-Wheel carried by the ring, a chuck spindle mounted on the head, a ratchet-Wheel fixed to the spindle, and mechanism operated from a common shaft for rotating both of said ratchet-Wheels, substantially as described.

7. In a machine for grinding glass objects, the combination of a support, a longitudinally-movable head mounted on said support, a stepped ring rotatably mounted on the head, a xed ystop cooperating with said ring for controlling the sliding movement of the head, a chuckspindle mounted on the head, a ratchet-Wheel carried by the spindle, engaging means for the ratchet-wheel, a rotating cam, and devices operated by said cam for imparting an intermittent movement to the ratchet-Wheel-engaging means, substantially as described.

8. In a machine for grinding glass objects,

the combination of a support, a longitudinally-movable head mounted on said support, a chuck-spindle carried by the head, a toothed Wheel fixed to the spindle, a rack-bar engaging the toothed Wheel for turning the latter, and means for operating the rack-bar, substantially as described.

9. In a machine for grinding glass objects,

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the combination of a support, a longitudinally-movable head mounted on said support, a chuck-spindle carried by the head, a toothed wheel 'fixed to the spindle, a reciproeating bail arranged adjacent to said toothed Wheel, means carried by the bar for engaging the toothed Wheel, and mechanism for moving the bar up and down to cause the spindle to turn, substantially as described.

10. In a machine for grinding glass objects, the combination of a support, a longitudinally-movable head mounted to slide on said support, a stepped ring carried by the head, a iXed stop cooperating with said ring to control the longitudinal movement of the head, a chuck-spindle carried by the head, a rotary shaft Q, carrying a cam, a rock-shaft 3, operated by said cam, and means operated by the rook-shaft for` rotating the chuck-spindle and the stepped ring intermittngly, substantially as described.

In testimony whereof I have hereunto set my hand, in presence oi two subscribing witnesses, this 5th day of December, 1898.

FRANZ ANTON HUBBUCH.

Witnesses:

ERNEST I. Solon, MAX J. BAEHR. 

